Corrugated rotary sieve.



0. L. LARSON.

CORRUGATED ROTARY SIEVE.

Patented Aug. 10, 1915.

; m T T-AE rrIoE Y oLE L.- LAB-SON, or MINNEAPOLIS, 'MiNnnsoTA.

CORRUGATED ROTARY SIEVE.

Patented Aug Application filed February 20, 1914. Serial No. 819,959.

1,149,375, Specification of Letters Patent.

formed with circumferentially spaced, longitudinally extended corrugations which are so closely positioned 'that all of the surface. ":oithe said sieve is corrugated. This rotary sieve should be set at an incline so that the succotash, or grain beingseparated thereby, w ll be continuously fed from the upper toward its lower end. The upper end of the corrugated sieve l is, as shown, telescoped onto a wooden ring 2 and the inner end portions of its corrugations are attached to thesaid ring at 3, by means of nails, staples, or other suitable devices. It is not necessary to'fa'sten the outer portions of the'corrugations, nor to fornithe supports there for to fit the corrugations thereof, because the said"; corrugations are self-sustaining, that is, they keepthe form into which they To all whom it may concern:

Be it known. that I, One L. LansoN, a citizen of the-United States, residing at Minneapolis, in the county of Hennepinand 5' State of Minnesota, have invented certain new and useful Improvements in Corrugated Rotary Sieves; and I'do hereby deolare the following to be a full, clear, and xjexact description of the invention, such as 0 will enable others skilled in'the art to which it appertains to make and use, the same.-

My invention has for its objectto provide an improved rotary sieve especially adapted for use in the separation lof wild, as well as tame cats from wheat and'similar grain. 1 1 Generally" stated, the invention consists of the novel construction and arrangement Referring to the drawings: Figurel is a 45 .vertical'section taken centrally and longitudinally through a rotary corrugated sieve designedin accordance with myin- 'vention; Fig.2 is a section taken on the andFig; 3-1s-alsect1on 50 taken on thel ne'rc m on F 1g. 1.

line :2 00 on Fig. 1;

The numeral 1 being made from stiif wire nettingbentinto otherwise, Thesurface of this sieve 1 is lndicates the'body of the corrugated tubular -sieve, the same, as shown,

chine power.

Let it be assumed that by suitable spout, the succotash or mixed grain to be separated, are delivered into the upper end of of parts'hereinaiter described'and defined are pressed- The ring, 2 is, as showrnse- 20 in the claims; e cured to a larger ring 8 anda metalhoop As is well known, oats are relatively long is secured on the ring 3 and overlaps] the and slender, as compared with wheat, so ad aeent corrugated end of the sieve. Y A th t h n p e t d dwise to a sieve, they diametrically extended bearing 5 is secured will go through perforations or mesh that to the ring '2 and, as shown, is provided with i 25 are so small that good wheat "will not pass a hubfi located at theaxis of the sieve. A s therethrough. Thegreat difiiculty has been metallic hoop '7' surrounds the lower end of to present the cats endwise to the mesh of th c rrugated sieve 1 and issecur O hB the sieve. I have discovered that this may outer portions of the corrugations of said b ffi i ntl accomplished by the use of a sieve at 8,by means-"of solder, or otherwise. 80 corrugated tubular rotary metallic sieve. A diametrically extended barf) is secured to The tubular rotary sieve is made ofwoven the loop '7, and is providedwith a hub 10 wire netting or screening material of the located at the axis of the rotary sieve. A proper mesh and of suflicicnt rigidity to shaft 11 is extended axially through the maintain its cm'rugated form. The meshes Sieve and through the hubs 6 and 10 of the 35 or perforations ofthelsicve must be in the bearings 5 and 9, and is shown as secured walls of the corrugations, as well as in the to the said hubs by set screws 12. The upinner and outer portions thereof, for a very per and lower ends of the'shaft llare jour+ important reason which will be hereinafter naled in bearings 13 and 14:, respectively.

more fully explained.- e Rotary rnotion may beimparted to thein: 40 Inthe accompanying drawings which cllned 8161 6, by any suitable means, such, illustrate the invention, like characters infor example, as by a crank, not shown, for dicate like parts throughout the several rotating it by hand, or by a gear,pul1ey, or views. i a sprocket, not shown, for operating it by'mathe sametoward the top, of the sieve, and

precipitate the same back onto lower corrua gations ofthe sieve. Under this action, the

graiiris continuously worked toward the 1ower end of the sieve; but under the res peated elevations and precipitations thereof,

2 g. v 1,149,375v

the oats ivill" be dropped endwise 7 onto the corrugations of the sieves and willpass" same, meshes of the sieve through which they canpass endwise, so that the 'chances 10 .many times greaterthan in a truly cylindrical sieve. In fact, in the truly cylindriojfthe oats ,working-through the sieve are cal or'smooth sieve, the cats IWhich inatfurall'y lie flat, ca'nfroll or slide flatwiseon- ,the sieve surface and have a chance to get through the meshes thereof, only when upended by some v ontorthe s1 eve surface.

action, such as dropping I Wahthe corrugated slevesurtace, the grain cannot rollback .i'rom oncporrugation. to anotheruntil it has ,been carried near to the top of the sieve, but

,a llio'f the shifting movementsthereof, With- .injthe corrugations, give the oats a chance to ,go endivise through themeshes of the sieve," The, corrugatlons of the sieve very greatlyjstrengthenthe same so that it s not bnly madeselfrsustair ir g in form, but "also rigid and capable of carrying a "considerable loadof gra n therein- Furthermore, it may be very cheaply made; In aetuahpraetice', I have found that by the useof this corruigatedrrotary sieve,:not only ordinary oats handpi'n oatstbut also-Wildcats maybe read "lily separated from Wheat. qseparatlngactlon of this corrugated metal 'Moreover, the

sieve is so efiicient that WithQthe' proper unesh n the sieve, Wild oats mayo be'separated even from tame oats; From this statein presenceof two Witnesses.

ment, it also, o'f course, follows,that wild oats may be readily separated from barley, rye, andthefike; ljn fact, by this improved sieve, almost any kind of relatively slim an d'long objects may be separated from rela- I tively short and thick objects. The efliciencyof the separation, as haszbeen'made 1. The combination with a rotary sieve made from stiff self-sustaining,vvoven w re l ettinghent to form longitud nally extended circumferentially spaced corrugat ons, of

a shaft extended axially. through said sieve and provided w th.sleve-supportmg heads including radial arms'and connect n 'hoo s the hoops being co-axial With saidisieve and engaging with the corrugations thereof only .atthe portlons 0f the corrugations aminediate adjacent the hoops.;. V

:2. Atubular rotary s eve made from stiff the corrugations being rounded and said corrugatlons serving as, fl ghts ;to elevate and precipitate the material tobeseparatedand through the lateral Walls ofwhich some of the-material is permitted to'move in an endise direction under rotationof the, sieve.

In testimony whereof I aflix my signature OL L RSON. Witnesses:

B. G, VVHEELER,

HARRY D. Klneosn.

opi esnof thispatent may teaobtainedwfor iivc cents each,"by addressing the Commissioners)! Patents, r I V washine nfl a V self-sustaining Woven Wire netting bent to; form longitudinally extended circumterentially spaced corrugations, the' bottoms of 

